My hose does not get sufficient pressure in combination with the Gardena coupling device

When you use a powerful pump, you need to ensure that it can also release its pressure sufficiently. Releasing pressure is important with lighter models, but even more so with more powerful ones.

When a pump has to push the water through a narrow hole, such as a Gardena coupling device, it may need to work harder while less pressure is being provided. If the worst comes to the worst, the pump may even break down entirely.

The easiest way to explain this is to compare it to drinking from a glass with a straw: the wider the straw, the easier it is to get water from the glass; the narrower the straw, the more effort will be required and the sooner you will get tired.

See an example of an incorrect application below


How to improve pressure with an easy coupling device

If you want an easy coupling device for your pump, you should opt for a quick coupling device. Always use two; one on each side.

Secure the quick coupling device to the hose by using a hose clamp. It is often necessary to push hard, but the result is an excellent connection once the hose with the clamp is firmly attached to the socket.

A quick coupling device fitted with a threaded connection instead of a socket is also available, and can be screwed easily to a hose of the same size, as shown in the photo below. (For products, please refer to the end of the blog.)

A more permanent solution to improve the connection

A different, more permanent set-up can be seen in the photo below.

In this case, to create a direct connection, you connect a threaded adapter to the pump control system to which a hose socket is attached.

This is a more permanent connection, and more suitable if you do not want to keep moving the device and prefer to leave it in one place: for example, in a shed or under some kind of cover to protect it from rain.

The best hose to connect to your pump

A standard 13mm hose works well with a single spray gun or a single oscillating sprinkler. However, if a very narrow hose is used, pressure will drop rapidly after a few metres or with multiple water take-off points.

For the average sprinkler that processes 800 litres per hour, you will need at least 19mm hoses. If you connect two or more sprinklers to one hose, however, we recommend using even 25mm hoses. For example, in combination with a ball valve on the closest sprinkler in order to prevent the farthest one having insufficient pressure. In this way, you create efficient irrigation zones.

The greater the distance and/or the flow rate, the thicker the hose needs to be in order to limit loss of pressure. Therefore, the connection should be reduced at the water take-off point and not earlier in the system. In other words: furthest away from the system and closest to your sprinkler.

We can provide you with the required advice relating to the pump, increased pressure, and any loss of pressure. However, regarding an irrigation plan, we recommend contacting an expert who may visit you and provide advice on location.

With this specific advice, we can look together at which of the pump models we supply comes closest to what has been recommended.


Please contact our customer service  if this was not quite what you were looking for, or if you have a different issue relating to connections.